Door-check.



H. W. DAGGS.

l DOOR CHECK. APPLICATION FILED MAY?,1909.

@5&3789 l Y Patented Mar. 29, 1910.

2 SHEETS-SHEET 1.

ATTURNEY Patented Ma1z29, 1910.

H. W. DAGGS.

DOOR CHECK. APPLICATION FILED MAY '7, 1909A www.,

Wi TMESSES entre?.

HERBERT w. nAGGs, or ROCHESTER, NEW YoRK, assrernon` To bases MANUFACTUR ING COMPANY, or ROCHESTER, NEW YORK. Y

Specication of Letters Patent.

'Patented Mar. aa, i910.

l Application filed May 7,1909. Serial No. 494,686.

To all whom it may concern:

Be it known that I, HERBERT' W. DAGGS,

useful improvements indoor checks, of that parts 1n the several views.

class designed more particularly for use in connection with screen doors and 1n which a spring 1s employed for closing the door, and

a check mechanism for preventing the spring from closing the door .violently orl with a slam.

The present invention has for its objects, L

among others, in addition to those usuallyl sought in such devices,to provide a simplified E rod,l detached, showing more fully the longitudinal groove or channel therein. Fig. 6'

is a View looking down upon the door when open, and associated parts, the cylinder with some connected parts being in horizontal sectlonl through the axis of the cylinder.

Fig. 7 is an elevation of the holding bracket pierced by the piston7rod,detached, further showing the form of the bracket.` Y Like numerals .of reference indicate like Referring to the drawings, 1 designates the door frame and 2 .the door or the wooden frame of a screen door or other movable 7 object to'which the invention is applied.

3, Figs. 2 and 6, v,is a closing spring for the door, of usual construction in this class of devices, connected at one end, as at 1l, with the door and at the other end, as at 5, with and improved'check of this general nature, in which provision is made for the accele'r- Y shown, whereby the .sprlng may be readlly ation or retardation of the action of the check upon the door as circumstances may require.

.The invention has also, for another object',

to provide an improved rest or holder for i the outer end of the piston-rod, formed with a longitudinal depression or channel forf receiving the end of the rod, thelatter bearing against said holder at all times exceptwhen swung far back.

I aim, further, at improvements in the details of construction, facilitating the assemblage of the parts and separation thereof,

when necessary.

ther objects and advantages of the inL vention will hereinafter appear and the novel features thereof will be particularly pointed out in the appended claims.

The invention is clearly illustrated in the 'accompanying drawings, nhich, with the numerals of reference marked thereon, form a part of this specification, and in which* the frame l, in any suitable manner, preferably by hookandeye connections as connected or disconnected, `when. desired.

Secured to the door, near the upper edge thereof, is a metal bracket 12, Figs. 1, 2 l and 6, held to place by a screw or the like 6, sothat it may be readily removed, when desired, the bracket being formed with a series of lugs 7, asseen in the different views,

' which extend at right angles from the body portion of the bracket, as shown, and which are adapted to embrace -and frictionally hold vone end of a metal cylinder S. The end of the cylinder held by this bracket is closed by a head portion 27, the opposite end being open, as plainly appears in Figs. 2 and 6, which open end is held within lugs 9 of a bracket 10 secured to the door 2 by simplel fasteners as screws or the like 1l.

13 is a piston-rod @for the cylinder 8 eX- tending outward through a central opening 1G in the bracket 10, and larger indiam-eter than the rod, asseen in Figs. 2, 6 and 7 the rodbeingprovided within the cylinder with a cup-shaped piston 14 of soft material, as leather, opening toward the head 27. This piston is held between an annular disk or detail in section, the section being` taken through the end of the cylinder showing the adjusting screw in elevation'. Fig. 4 is an end elevation of one of the brackets or holders for the cylinder, removed. Fig. 5 is yWasher 15 and a metal collar 17, preferably rigid on the piston rod, a concentric coiled spring 18, large in diameter, being confined v between the Washer 15 4within thev piston 14, and thehead 27 of the cylinder, the coils at they end'of the spring next the washer being reduced to closely encircle the pistonan elevation of the rest for the pisto-nrod to hold to place thereon, as shown in llt) tion, as-in Fig. 2, vthe spring 18 is closely compressed against the head 27 of the cyli'nder but it expands, as the door is opened, serving to push the iston `14 toward the opposite end of the cy inder and to keep the vouter end of the 4piston-rod continuously against and in contact with the rest 21, until the,l door passes a position at right-anglesl withlits closed position. A small butling spring29, Figs.`2 and 6, free on the pistonrod, within the cylinder, serves to prevent y the collar 17 beingfdriven -violently against the holder when 'urged by the spring 18, as stated, when the door1 is o ened. A screw 25, Figs. 2, 3 an 6, within the i bracket 12, is threaded*longitudinallyinto j ahole or' air passage 31 in the end portion y 'as the piston 111 is moved within the cylinbe caught more or'less' quickly when returned 'by the spring 3, and lthus caused to.

.A escaperof 'the' air from the cylinder while; the door is swinging open, and the ready Figs. 2- and 5, in which to receive the serving to hold said end of the rod normally 27 ofthe cylinder 3, for the purpose oi controlling the amount of air passing into and out of the cylinder throughv said opening der by the swinging of the-door, as stated. This screw is flattened on one side, as` seenV at 28 in Fig. 3, on a taper or slant so as to close the hole 31 more vor Vless perfectly as the screw is turned in oi' out. 'By moving. this screwv in'or out to vary the opening through the 'cylinder head the door 2 may close gentlyand without noise or jar.

When the door 2 is swung open at any time and the piston 14 moves towardthe bracket 1`0, as stated, the air inthe part 32 of the cylinder 8, Figs". 2 and 6, must/ have means of escape. vForthispurpose 1 commonly t the piston-rod 13 loosely in the bracket 10, at- 16 as stated, and, besides, form an opening 30 through the bracket, a's shown in Figs. 2, 6 and 7. This permits the easy iniow of air into'that end of the cylinder while the door is swinging shut and the piston moving toward the head27.A This open# ing 30 also serves through which to inject a lubricant, as oil, to lubricate the piston 14.

The rest 21 for holdingand controlling the outer end of the piston-rod is formed with a longitudinal groove-or channel 20,

rounded end 19 of the rod, the spring 1S against the inner or rear end wall 24- of the rest. When, however, the door is swung out closed position, as shown in Fig. 6, the pisj tonrod will assume a position substantially l at right angles with the rest 21, with its j rounded end bearing against the bottom of the channel 20, the latter part of its motionA l for a short distance being substantially a I lateral or sidewise slide outwardly along essere said channel to a point near the eXtreme end of the rest, the piston-rod being now pushed to its AeXtreme. outward position by the spring 18. As the door continues to swing outward the end of the rod will part from or leave the rest 21, the rod eventually occupying the positionA shown by horizontal dotted lines, the door 2 occupying a position in a plane practically parallel with its position when closed. As the door thus swings back to its extreme open position the bearing or rounded end of the piston-rod will follow the curved dot-and-dash line concentric with the axis of the hinge 3st, this line being again i followed in reverse direction by the end ot the rod when the door is returned to its closed. position said end oi' the rod meeting and sliding backward along the rest 21 to its normal position as in Fig. 2; The rest 21 is formed with a flange 22, Figs. 1,2 and 6, pierced by simple fasteners as screws 23, for securing the said rest to the frame 1 of the door. .i

The operation of the devicev will be readily understood and, brietlystated, is as follows: When the door is swung open 'against the action of the spring 3, the cylinder 8 is carried thereby gradually away fromv the fixed rest 21, the inclosed spring 18, in the meantime, pressing against the piston 111, servesk to push the latter toward the open end of the cylinder and keep the outer end.

. of the rod 13 continually in contact with the` rest 21 until the-door passes a position about at right angles with its closed position. As

the piston is thus moved toward the open,

end of the cylinder air tlows intothe oppo site end of the cylinder through the opening 31 in the head 27, to ll the space- 33 thereinv and to be in readiness to form a butter or cushion for the piston 111-, as itis moved back again on z. :count of the return motion of the door, to prevent the violent. closing or slamconined in the space 33, to buff the return.- ing door and momentarily substantially stop its motion just before it reaches its closed position, but the power of theclosing spring 3 is suiiicient to quickly overcome the united action of theconned air and the spring to resist the closing of the door, and so completely close the door without jar or noise against this opposition.

Modiiications in detail may be resorted to without departing from the spirit of the iny vention or sacrificing any otits advantages. to a position about at right angles with its 1 What is claimed as new is 1. ln' a4 door check, the .combination with a frame and a swinging door, ofmeans for checking the' door comprising a cylinder on the door,a piston within the cylinder, a spring between the piston and the adjacent end of the cylinder, a buer-Spring in the cylinder between the piston and the otherl ming of the door by the closing spring 3.l The confined spring 1S acts also, with the air end of saidcylinder, a piston-rod and a seat for the outer end thereof having'a longitudinal straight-lined depression with Wlhich said outer end has'normal contact.

2. A door check comprising a rod having a rounded outer end, a cylinder through one end of which the rod extends, a piston on the rod Within the cylinder', av spring acting on the piston Within the cylinder, and an abutment for the outer end of the rod, said' abutment having a longitudinal straight-lined depression with flanges for retaining the rod in contact wall of the depression. i

3. In a door check, a cylinder, brackets y' for holding the same having anges frictioni lally embracing the ends of the eylinder, a piston Within the cylinder, a piston-rod movable through one of the brackets, an abut- With the bottom t ment for the outer end of the said rod, said abutment bein elongated and the end of the l rod having sliding engagement therewith as 'the door moves on its hinges, and a spring l Within the cylinder between the piston and the adjacent ends of the cylinder.

4. In a door check of the classdescribed, a seat for the outer end of the piston-rod of the check, said seat having a securing flange and a longitudinal straight-lined depression -With which said rod has a sliding Contact.

In Witness whereof, I have hereunto set my hand this 23d day of April, 1909, in the presence of two subscribing Witnesses.

HERBERT W. DAGGS.

Witnesses:

g E. B. VVHITMORE, A. M. VVHITMORE. 

